Rules regarding long distance ranged attacks and perception


Rules Questions


So if one were to use a longbow and the feat Far Shot, one should be able to hit targets at a long distance. For every range increment beyond you'll get a -2 to attack or -1 if using Far Shot.

A bow can have up to 10 times its range increment. Let's take 1000ft. With the mentioned feat that should be a -10 penalty. Doable you would say.

Now regarding perception at those distances. The dc to see someone who isn't using stealth is 0. For every 10ft distance from you the dc will increase with +1.

So a 1000ft would be a dc 100 perception. That would be nigh impossible.

So what am I missing here? They give you rules to attack at such distances and even make it quite feasible to hit something but make it practically impossible to see the target to attack it.

If I'm missing something then please tell me and if I'm correct then give me some solutions.

Also a friend of mine mentioned that things like scrying should allow it as they function like you're there but I'm not sure that's accurate.

Let me know! Thanks!


Some rules don't work when taken to an extreme.

For example, no one can see the sun in the sky (or any of the stars for that matter). As it's millions of miles away from Golarion.

Ultimately you end up with the problem that it's improper to apply perception rules under certain conditions, such as someone walking across an open field 1000ft away not trying to hide.

Sometimes the rules just don't work.

Scrying wouldn't help because it only lets you see a small area around the target. You need to know where the target is in relation to yourself and how far away they are in order to accurately fire the a weapon at someone.


Sample DCs

3: Notice a visible creature 30' away is 6 (base 0 +1/10'). Your average goblin will notice a PC 30' away on a roll of 4 or higher.

5: Notice a visible creature standing on the other side of a door.

10: Notice a visible creature on the other side of a 1' thick wall.

18: Notice that the food in the next room has spoiled (5 + 10/1' wall + 1/10'). DC drops to 13 if you're near a door.

30: Find an arrow trap while sleeping.

31: Find an arrow trap at the end of the next room, a 60' long corridor, without first opening the door leading into said corridor.


The table you're referencing is prefaced by

Perception wrote:
The following table gives a number of guidelines.


I would consider that improper use of perception, and would rely on a GM's judgement heavily when dealing with long-distance spotting. Otherwise, your DC to see a creature 1000ft away would be the same DC as hearing the conversation between a duo of creatures 1000ft away.

I asked similar questions when trying to make an Arcane Archer. Don't recall if I ever got a decent answer... At the very least, it was determined that an army or Gargantuan creature was fairly easily spotted 1000ft, for the purpose of launching an arrow imbued with fireball, even if it would be difficult to visibly notice every detail of the square I was targeting.


Well it's obvious to me that there seems to be a flaw regarding this.

But regarding using other means like magic to spot a target, would that be plausible? Because I agree with Claxon regarding that.


Perhaps if you spoted someone fleeing to an open field, since you have been seen him since he was near, you would not have to keep using perception checks as he goes farther. This could be an example of how to shoot at 1000 feet without using the perception check.

Also, if it is a giant or any other really big creature, are there no rules to lower this perception DC?


Drimoran wrote:


Also, if it is a giant or any other really big creature, are there no rules to lower this perception DC?

There are rules, yes. It's called their penalty to stealth, generally. It's still nowhere near enough to offset the use of perception at such great distances. You could easily feasibly see a figure towering well over the height of the tallest trees across this (admittedly large) field. But, perception would tell you diddly squat unless you beat a DC in the higher 50s or 60s in the best of conditions...


Just for fun, if we assume that the observer is neither good nor bad at perceiving (+0), and the atmosphere is clear, we can project the size of a creature of height H at a distance D into a plane at a distance P. The projected image would be given by the expression: X=(H·P)/D

Lets assume there are three guys Fred, George and Kevin. All of them are regular guys who's height is the same; 6 feet tall (medium size). Fred stands the closer at 10 feet, George stands at 100 feet and Kevin stands the further at 1000 feet.

If they were placed in a way that we could see them next to each other, knowing that George is 6 feet tall, we would see Fred next to him as a 60 feet tall giant (gargantuan size), while Kevin would be seen as a 0.6 feet tall imp (diminutive size).

Now, according to the rules of perception, Fred who is at 10 feet can be seen with a 1 DC perception check, George who is at 100 feet can be seen with a 10 DC perception check and Kevin who is at 1000 feet can be seen with a 100 DC perception check.

On the other hand, they are seen next to George as a 60 feet tall giant and a 0.6 tall feet imp. An actual 60 feet giant next to George would have a penalty on stealth of -12 which means a -2 DC perception check. An actual 0.6 feet imp next to George would have a bonus on stealth of +12 which means a 22 DC perception check.

As we can see, the distance rules almost support the size rules for Fred (dis. rules=1 , size rules=-2) but not for Charlie (dis. rules=100 , size rules=22).

Even if the atmosphere was a little bit contaminated, it does not explain the 78 increase in DC. If I were you I would make a table based on this bonus and penalties on stealth. Shouldn't be difficult. You could also think about adding some penalties because of atmosphere's dirt at certain points.


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I am in the mood of doing this table because I may encounter the same problem in my games.

Taking into account that any size category increase can be made by doubling your size, and any size category decrease can be made by halving your size. Also keeping in mind the formula: X=(H•P)/D.

The question is the following: Where should a creature, twice as big as the original, be standing so they both appear to be the same size?. This is, If (H=2•X) then (D=2P). So given a certain DC for a certain distance, a creature of the same size but twice as far has a penalty of -4.

The only thing to do is agree in a fair DC for a certain distance, and then increase the DC in 4 each time you double the distance, and decrease the DC in 4 each time you halve the distance.

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I would first come to the agreement of how big a creature must be in order to always be seen in the adjacent square (5 foot), for instance, sitting on top of a 5 feet table. This way you can assignate the 1 DC perception check. Then, each time you increase distance you add 4 to the DC, each time you increase size you add 4 and each time you decrease size you take 4.

If you think this size is Fine then start the 1 DC perception check of a medium creature in 80 feet. If you think this size is diminutive, then start the 1 DC at 40 feet. If you think this size is tiny, then start the 1 DC at 20. And so on...

For example, if I thought that smaller than diminutive is not always seen at an adjacent table, this would be my chart for distances:

40 feet -> 1 DC
80 feet -> 5 DC
160 feet -> 9 DC
320 feet -> 13 DC
640 feet -> 17 DC
1280 feet -> 21 DC
2560 feet -> 25 DC
5120 feet -> 29 DC

At some point you have to take into account that light fades with distance.

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I know this feels like a House Rule, but I am actually just using the size chart rule instead of the distance to the source rule.


It's a neat idea. Sadly, I doubt it can actually be applied to any given pathfinder game, and it must be said that it is indeed a houserule; You're throwing in 'real' math where pathfinder rules already clearly exist. It's also inapplicable to any other scenario requiring perception; You naturally can't use the same formula to notice finer details of, listen to, or smell a creature a listed distance away.

I'm curious as to what would happen if you plugged in numbers for a celestial body like the moon, or a cruising altitude passenger plane, though. According to Pathfinder rules, the moon is impossible to see. (Something like -8 million to the DC due to size, but over +130 million for distance)...

As an alternative system that's somewhat more closely aligned to the rules, One thing you could propose is that the distance modifier is simply not applicable for noticing a perfectly visible creature; It will always be DC 0. Instead, save that modifier for noticing particular features or visible details of that creature or using other senses, like sound or scent. Similarly for objects, let that modifier be for noticing particular details within an observed 5-foot square.

The other alternative is to just outright fudge the numbers as a GM by adding your own ludicrously large modifiers, Or in other words, just go by feel.


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OMG! I just realized that in Pathfinder no one can smell the Sun!


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Fuzzy-Wuzzy wrote:
OMG! I just realized that in Pathfinder no one can smell the Sun!

If you're smelling the sun, please make a Craft(alchemy) check to know what the hell was in your last drink...


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Bane Wraith wrote:
... 'real' math ...

Ouch!

Bane Wraith wrote:
I'm curious as to what would happen if you plugged in numbers for a celestial body like the moon, or a cruising altitude passenger plane, though. According to Pathfinder rules, the moon is impossible to see. (Something like -8 million to the DC due to size, but over +130 million for distance)...

Medium is ~6 feet, Moon is 1.1398e+7 feet. Each category is twice as big as the previous one, this is, the Moon is X=log2(1.1398e+7/6)=20.8573 categories bigger, which is a -83.4292 Stealth check.

On the other hand, the Moon is 1.261155e+9 feet away. A medium creature at this distance, which is Y=log2(1,261155e+9/40)=24.9102 times further than 40 feet, has a 99.6408 DC penalty to be seen.

So to see the Moon in the sky the DC perception check is 17, which is the same DC as spoting a penny (2 categories below Fine) 10 feet away from you. This may not be exactly accurate but close enough, and you can see how it makes more sense than a 1261154920 DC perception check.

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I said it is not a house rule because I am using Size category pathfinder rules instead of distance to source rules, as they contradict each other when applying maths.


Except your math doesn't work because size categories doesn't extend beyond colossal and neither do their the bonuses or penalties for being found. Sure you can extrapolate, and I'm not suggesting you shouldn't allow people to spot the moon, but you also have to be aware you're just making stuff up because it suits you.

Also, size categories are not twice as large as their previous ones.

medium is 5ft
large is 10ft
huge is 15ft
gargantuan is 20ft
colossal is 30ft


Sorry. the 'real' math thing was not supposed to be some sort of quip or jab. I only meant that out-of-game physics, chemistry, biology, or mathematics tend not to apply. When there are written, over-simplified rules in the tabletop RPG, leave your STEM fields at the door. Drinking a hearty dose of mercury can be a DC20 poison. Acids, bases, and virtually any other reactive compound are all considered 'acids' (as are poisons and venoms, technically, yet the rules actually cover that). Skill checks can enable a bat to fly through a windstorm completely unhampered.

In this case, it is a houserule because you're taking an intermediate step between 'determining distance/size' and 'The final DC' that is not included in the core rulebook. It's not a GM's judgement of increasing or decreasing the DC with a special modifier; You're using a new calculation to begin with, and modifying rules already in place.

Though I agree, and it's clear, that perception will often require the GM's involvement and judgement to keep things going smoothly. Your method is not a bad one at all for estimating difficulty class at moderate distances. (It would also allow one with a ludicrously good perception check, like a fully grown dragon, to spot things we'd need a telescope to find.)

Speaking of telescopes, spyglasses are also terribly useless when it comes to long distance perception. Wow, seeing a person 1000ft away is now DC50 instead of 100.... But at the least, it'd allow the average person to know there's a freakin' moon in the sky according to your post. =P


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Claxon wrote:
... you're just making stuff up because it suits you

I am not making stuff up, it is size category rules and how the world works. I am using maths. Also it is not because it suits me. I didn't create this thread I am just providing a solution as TrollingJoker requested.

TrollingJoker wrote:
If I'm missing something then please tell me and if I'm correct then give me some solutions.

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Claxon wrote:

Also, size categories are not twice as large as their previous ones.

medium is 5ft
large is 10ft
huge is 15ft
gargantuan is 20ft
colossal is 30ft

You are confused with space, this is the ammount of squares they occupy on the board. The heigth of the creature is in another column:

medium 4 to 8 feet
large 8 to 16 feet
huge 16 to 32 feet
gargantuan 32 to 64 feet
colossal is 64 feet or more

Go to d20pfsrd and check it.

Of course they do not give anymore values for larger than colossal, but you can see the penalties are not arbitrary. Incresing size category is twice as high, and each category larger has a -4 on stealth checks.

With this post I am not forcing anyone to use this rule or say it must be this way, but to provide a solution to another rule wich is not real when it comes to long distances. I was just trying to be helpful. Anyway, coming up with this took some time from me and I posted it because I would have liked to have seen something like this posted. Feel free to use it, I certainly will.


I believe that as a poster above said this rule does not scale real well.
1) Also as the sun example (which I know has been beat to death) you do not see the sun but you see its radiation.
2) A lot of people do not know how our eyes work so it would be a good to re-look at just how they do if you do not.
So if you use magic to block out all visible radiation and you have normal vision does that means the sun is no longer in the sky?
3) Our eyes work very well at detecting movement, so if a target was doing so I would provide modifiers to offset the simple rule provided in the book.

Again this is a case where in trying to keep rules simply or provide a simple rule to solve problems it does not hold up under every example you would encounter and a GM should understand this. I know that not all GM's do or will as some GM's are just by the book and if the book says X then that is the way it is.

MDC


Drimoran wrote:

40 feet -> 1 DC
80 feet -> 5 DC
160 feet -> 9 DC
320 feet -> 13 DC
640 feet -> 17 DC
1280 feet -> 21 DC
2560 feet -> 25 DC
5120 feet -> 29 DC

What an outstanding chart. I am incorporating the principal into my home games right away.

If I could suggest a more game-friendly version however

40 feet -> +1 DC
60 feet -> +2 DC
80 feet -> +3 DC
100 feet -> +4 DC
120 feet -> +5 DC
250 feet -> +10 DC
500 feet -> +15 DC
0.25 mile -> +20 DC
0.5 mile -> +25 DC
1 mile -> +30 DC

This makes the shorter distances a little more granular and makes the further distances a little more relatable to the average person.

Edit: I think I want to change ranged weapon rules in my game to reflect these distances as negative modifiers. That will require a bit more work (like reclassifying ranged weapons by range types rather than range increments. [Thrown, Short, Long, Siege off the top of my head.] Which set a hard cap on range. Maybe point blank shot removes or mitigates the lower penalties. I really like combining charts for multiple uses.


Claxon wrote:
For example, no one can see the sun in the sky

I think this is a miss-interpretation of the rule (if I may). The perception check gives you two pieces of information. (1) that a thing is there, AND (2) precisely what 5 foot squares it occupies.

It specifically does NOT let you see an object. Ie, you can make a perception check against an invisible foe. If you succeed you are made aware of their presence and know exactly what space they occupy. But you don't get to see them. They still get a full cover bonus.

Conversely, seeing an object (like the sun) does not mean you can precisely know its location down the exact 5 foot cubes (in this case) that it occupies. Knowing exactly the space it takes up would be a huge and quite impossible check. But that doesn't preclude you from being able to see it. Since we already know that isn't covered by perception anyway.


There's no need to re-imagine attack rolls, I think. It's clear to see where Pathfinder's rules break down in terms of perception vs. long distance objects- but Attack rolls have traditionally worked, even at range. Rules wise (And this is a thread posted in the rules forum), attack rolls function adequately in this situation.

An answer regarding long distance perception rolls would suffice to rule whether something has total concealment towards the attacker, and whether it's possible to target a particular square at distance.

I used the moon example instead of the sun hoping to avoid the whole light-source thing, but I suppose enough people are going to argue there's little difference.

Unfortunately, the way eyes work is not that applicable in pathfinder. I started a thread a long, long while back with regards to Ebon Eyes, the spellblight. It creates a magical film over each of your eyes that inverts light and darkness Long story short, it was determined that sunglasses worn over ebon eyes would not function to allow the character to see during the day, contrary to all intuition or logic suggesting otherwise. It was pretty convincing at that point that you're only ever going to get away with exactly what the rules say, or the GM's houserules, when no mechanics exist in-game to cover what you want. Science is held at arm's length.


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Rules for perception:

PRD wrote:


Perception has a number of uses, the most common of which is an opposed check versus an opponent's Stealth check to notice the opponent and avoid being surprised. If you are successful, you notice the opponent and can react accordingly. If you fail, your opponent can take a variety of actions, including sneaking past you and attacking you.

Perception is also used to notice fine details in the environment. The DC to notice such details varies depending upon distance, the environment, and how noticeable the detail is.

Emphasis mine. The context with which to read the perception rules isn't 'to notice anything, anytime, anywhere'. It is vs opposed stealth, or to notice fine details, or things that were intentionally hidden (opposed sleight of hand, etc).

E.g, one misapplication of perception is to notice the sun - which is millions of miles away so has a supposed DC in the billions. But the sun is not a fine detail in the environment, and it is not using stealth.

Is the opponent using stealth? If yes, check against their stealth roll with appropriate distance modifiers, etc.

Is the opponent a fine detail in the environment? Probably not, so if they aren't stealthing, no perception check needed to notice them. You can spot them, but may not be able to read the words on their shirt that say "I'm a good chef".

Of course with environment, a GM will need to a do a lot of adjudication. Are you in Kansas? Then you can probably see them a long ways off. Are you in the rocky mountains? Then terrain might block view of them 20' away.


TrollingJoker wrote:

So if one were to use a longbow and the feat Far Shot, one should be able to hit targets at a long distance. For every range increment beyond you'll get a -2 to attack or -1 if using Far Shot.

A bow can have up to 10 times its range increment. Let's take 1000ft. With the mentioned feat that should be a -10 penalty. Doable you would say.

Now regarding perception at those distances. The dc to see someone who isn't using stealth is 0. For every 10ft distance from you the dc will increase with +1.

So a 1000ft would be a dc 100 perception. That would be nigh impossible.

Keep in mind archery combat at such extreme distances was not historically one archer taking shots at one target. It would be a whole unit of archers shooting arrows at a mass group of people and relying on odds that they'd hit a bunch of folks in the opposing crowd.

This not something that simulates well on the individual tatical scale but on the mass combat scale.

Also in most outdoor situations, you generally won't have a 1000 feet of clear siting vision unless the encounnter is taking place inside a giant empty cube.

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